Look up a dinosaur

The genus Abydosaurus dates to 2010, the year D. Chure and colleagues described it. The name means “abydos lizard.”

Fossils referred to Abydosaurus date to the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from the United States, including the Cedar Mountain Formation. It was a herbivore and walked on four legs.

Acrocanthosaurus was formally named in 1950 by J. W. Stovall and W. Langston.

It lived in the Early Cretaceous (Aptian · Albian), roughly 121.4 to 100.5 million years ago. Finds come from the United States, including the Antlers Formation. It was a carnivore and walked on two legs.

The genus Aepisaurus dates to 1852, the year P. Gervais described it. The name means “lofty lizard.”

Fossils referred to Aepisaurus date to the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from France. It was a herbivore and walked on four legs.

In 2017, P. C. Sereno published the name Afromimus. The name means “africa mimic.”

It lived in the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from Niger, including the Elrhaz Formation. It was a herbivore and walked on two legs.

The genus Agustinia dates to 1999, the year J. F. Bonaparte described it. The name honors a person tied to the fossil or its study.

It lived in the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from Argentina, including the Lohan Cura Formation. It was a herbivore and walked on four legs.

The genus Albalophosaurus dates to 2009, the year T. Ohashi and P. M. Barrett described it.

It lived in the Early Cretaceous (Barremian), roughly 125.8 to 121.4 million years ago. Finds come from Japan, including the Kuwajima Formation. It was a herbivore and walked on two legs.

Algoasaurus was formally named in 1904 by R. Broom. The name honors a person tied to the fossil or its study.

It lived in the Early Cretaceous (Berriasian · Valanginian), roughly 143.1 to 132.6 million years ago. Finds come from South Africa, including the Kirkwood Formation. It was a herbivore and walked on four legs.

Altirhinus was formally named in 1998 by D. B. Norman. The name means “high nose.”

It lived in the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from Mongolia, including the Khuren Dukh Formation. It was a herbivore and could move on two or four legs.

The genus Altispinax dates to 1923, the year F. V. Huene described it. The name means “with high spines.”

It lived in the Early Cretaceous (Valanginian), roughly 137.1 to 132.6 million years ago. Finds come from the United Kingdom, including the Wadhurst Clay Formation. It was a carnivore and walked on two legs.

In 1993, D. A. Russell and Z. M. Dong published the name Alxasaurus. The name means “alxa lizard.”

It lived in the Early Cretaceous (Aptian), roughly 121.4 to 113.2 million years ago. Finds come from China, including the Bayin-Gobi Formation. It was a herbivore and walked on two legs.

Amargasaurus was formally named in 1991 by L. Salgado and J. F. Bonaparte. The name means “la Amarga lizard.”

Fossils referred to Amargasaurus date to the Early Cretaceous (Barremian), roughly 125.8 to 121.4 million years ago. Finds come from Argentina, including the La Amarga Formation. It was a herbivore and walked on four legs.

Amargastegos was formally named in 2014 by R. E. Ulansky.

Fossils referred to Amargastegos date to the Early Cretaceous (Barremian), roughly 125.8 to 121.4 million years ago. Finds come from Argentina, including the La Amarga Formation. It was a herbivore and walked on four legs.

In 2007, S. Apesteguía published the name Amargatitanis. The name means “amarga giant.”

It lived in the Early Cretaceous (Barremian), roughly 125.8 to 121.4 million years ago. Finds come from Argentina, including the La Amarga Formation. It was a herbivore and walked on four legs.

The genus Amazonsaurus dates to 2003, the year I. D. S. Carvalho and colleagues described it. The name means “amazon lizard.”

It lived in the Early Cretaceous (Aptian · Albian), roughly 121.4 to 100.5 million years ago. Finds come from Brazil, including the Itapecuru Formation. It was a herbivore and walked on four legs.

Anoplosaurus was formally named in 1879 by H. G. Seeley. The name means “unarmed lizard.”

Fossils referred to Anoplosaurus date to the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from the United Kingdom. It was a herbivore and walked on four legs.

The genus Aquilops dates to 2014, the year A. A. Farke and colleagues described it. The name means “eagle face.”

Fossils referred to Aquilops date to the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from the United States, including the Cloverly Formation. It was a herbivore and walked on two legs.

Aragosaurus was formally named in 1987 by J. L. Sanz and colleagues. The name means “aragon lizard.”

It lived in the Late Jurassic · Early Cretaceous (Tithonian · Berriasian), roughly 149.2 to 137.1 million years ago. Finds come from Spain, including the Villar del Arzobispo Formation. It was a herbivore and walked on four legs.

Aratasaurus was formally named in 2020 by J. M. Sayão and colleagues. The name honors a person tied to the fossil or its study.

Fossils referred to Aratasaurus date to the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from Brazil, including the Romualdo Formation. It was a carnivore and walked on two legs.

Archaeoceratops was formally named in 1997 by Z. Dong and Y. Azuma.

Fossils referred to Archaeoceratops date to the Early Cretaceous (Aptian · Albian), roughly 121.4 to 100.5 million years ago. Finds come from China, including the Zhonggou Formation. It was a herbivore and walked on two legs.

In 1887, H. G. Seeley published the name Aristosuchus. The name means “best/noblest Sobek.”

It lived in the Early Cretaceous (Barremian), roughly 125.8 to 121.4 million years ago. Finds come from the United Kingdom, including the Wessex Formation. It was a carnivore and walked on two legs.

Arkansaurus was formally named in 2018 by R. K. Hunt and J. H. Quinn. The name means “arkansas lizard.”

Fossils referred to Arkansaurus date to the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from the United States. It was a herbivore and walked on two legs.

The genus Asiatosaurus dates to 1924, the year H. F. Osborn described it. The name means “asian lizard.”

Fossils referred to Asiatosaurus date to the Early Cretaceous (Aptian · Albian), roughly 121.4 to 100.5 million years ago. Finds come from Mongolia, including the Öösh Formation. It was a herbivore and walked on four legs.

The genus Astrodon dates to 1865, the year J. Leidy described it.

Fossils referred to Astrodon date to the Early Cretaceous (Aptian · Albian), roughly 121.4 to 100.5 million years ago. Finds come from the United States, including the Arundel Formation. It was a herbivore and walked on four legs.

In 2012, M. D. D'Emic published the name Astrophocaudia. The name honors a person tied to the fossil or its study.

It lived in the Early Cretaceous (Albian), roughly 113.2 to 100.5 million years ago. Finds come from the United States, including the Paluxy Formation. It was a herbivore and walked on four legs.